Polishing-brush.



WILLIAM DIXON, OF NEJVARK, NEW JERSEY.

POLISHING BRUSH.

SPECIFICATION forming part of Letters Patent No. 696,725, dated April 1, 1902.

Application filed July 11, 1900. Serial No. 23,179. (No model.)

To ct'ZZ whom it may concern:

Be it known that I, WILLIAM DIXON, a citizen of the United States, residing in Newark, in the county of Essex, in the State of New Jersey, have invented certain new and useful Improvements in Polishing-Brushes, of which the following is a specification.

Polishing-brushes used for polishing metal articles of all kinds are placed on a tapering spindle and forced home on the same. The removing of these brushes from the spindle and placing them on the same exerts a strain on the hub or block of the brush, so as to cause the frequent splitting of the block, rendering the brush incapable of further use. Various means have been devised for strengthening the block of the brush, such as reinforcing wire rings placed around the hub of the block, but without success.

The object of this invention is to provide means for securely fastening the block of the brush upon the spindle without straining or splitting the same; and for this purpose the invention consists in the combination, with the block of a brush, of a soft-metal bushing inserted in the same and having a tapering opening, the ends of said bushing being of larger diameter than the middle portion of the same and fitting into a correspondinglyshaped openin gin the block, and anchors pro jecting from said enlarged ends of the bushing into the adjacent portions of the block.

In the accompanying drawings, Figure 1 represents a side elevation of my improved polishing-brush; and Fig. 2 is a horizontal section of the same on line 2 2, Fig. 1.

Similar letters of reference indicate corresponding parts.

Referring to the drawings, A represents the block or center of my improved polishing brush, which block is provided with one or more radial or converging rows of bristles B and with a central bushing C, of lead, leather, or other suitable soft material, which is secured by suitable anchors d into the center of the brush-block. Said anchors d consist of projections which enter corresponding holes in the block A. The hole of the center bushing O is made to taper toward each side of the block, so that the block can be driven home onto the tapering spindle from either side. The ends of the bushing at the sides of the block are made of larger diameter than the middle portions of the same, as shown, and the anchors project from the enlarged end portions of the bushing into the adjacent portions of the block. By this construction the strain of removing and replacing the brush on the operating-spindle is removed from the anchors and resisted directly by the block and bushing. The anchors being located on the enlarged ends of the bushing offer strong resistance to the strain of use and effectively prevent the block from becoming loose on the bushing. The end portions of the bushing at each end of the cylindrical middle portion are made outwardly tapering, and each end portion is preferably tapered at a greater angle at its outer than at its inner surface, as clearly shown in Fig. 2, so that a bushing having a stronger wall toward its ends for resisting the wedge action of the spindle when applying the wheel thereon is obtained.

The center bushing forms an effective protection for the block against the strain of the spindle when driven home on the same, as the bushing yields and permits a certain degree of expansion without straining the block. The splitting of the block is thereby effectively prevented and a considerable percentage of loss caused by the splitting of the blocks almost entirely avoided and a more permanent polishing-brush supplied, which can be used until the bristles are entirely worn out.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A polishing-brush, consisting of a block, a central bushing therein, a cylindrical middle portion of said bushing, and outwardlyflaring end portions for securing said bushing in said block, substantially as set forth.

2. The combination,with a brush-block having an opening, of a soft-metal bushing in the same and composed of a cylindrical middle portion, end portions tapering outwardly from said middle portion at each side of the same, and provided each with an outwardly-tapering opening, and anchors projecting from said outwardly tapering end portions into the brush-block, substantially as set forth.

3. The combinatiomwith abrush-block having an opening, of a soft-metal bushing in the same and composed of a cylindrical middle In testimony that I claim the foregoing as portion,end portions tapering outwardly from my invention I have signed my name in pi'es- 10 said middle portion at each side of the same, once of two subscribing witnesses.

and provided each with an openin" tapei'in outwardly at a less angle than the same, and WILLIAM DIXON anchors projecting from said outwardly-taper- Witnesses:

ing end portions into the brush-block, snlo- GEO. L. WVHEELOGK,

stantially as set forth. M. H. WURTZEL. 

